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include/comma/ast/DSTDefinition.h

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//===-- ast/DSTDefinition.h ----------------------------------- -*- C++ -*-===//
//
// This file is distributed under the MIT license. See LICENSE.txt for details.
//
// Copyright (C) 2009, Stephen Wilson
//
//===----------------------------------------------------------------------===//

#ifndef COMMA_AST_DSTDEFINITION_HDR_GUARD
#define COMMA_AST_DSTDEFINITION_HDR_GUARD

#include "comma/ast/AstBase.h"
#include "comma/ast/Type.h"

#include "llvm/ADT/PointerIntPair.h"

namespace comma {

//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//

//===----------------------------------------------------------------------===//
class DSTDefinition : public Ast {

public:
    enum DSTTag {
        Attribute_DST,          
        Range_DST,              
        Type_DST,               
        Constrained_DST,        
        Unconstrained_DST       
    };

    DSTDefinition(Location loc, Ast *base, DSTTag tag);

    DSTTag getTag() const { return static_cast<DSTTag>(bits); }

    Location getLocation() const { return loc; }


    const DiscreteType *getType() const {
        return const_cast<DSTDefinition*>(this)->getType();
    }
    DiscreteType *getType();

    bool definedUsingRange() const { return getTag() == Range_DST; }



    const Range *getRange() const;
    Range *getRange();

    bool definedUsingAttrib() const { return getTag() == Attribute_DST; }




    const RangeAttrib *getAttrib() const;
    RangeAttrib *getAttrib();

    bool definedUsingSubtype() const { return getTag() == Type_DST; }

    bool definedUsingConstraint() const { return getTag() == Constrained_DST; }

    bool definedUsingDiamond() const { return getTag() == Unconstrained_DST; }

    // Support isa/dyn_cast.
    static bool classof(const DSTDefinition *node) { return true; }
    static bool classof(const Ast *node) {
        return node->getKind() == AST_DSTDefinition;
    }

private:
    Location loc;
    Ast *definition;
};

} // end comma namespace.

#endif

---